The .map file is used for debugging (for example, in Chrome there are new features that allow you to "display" in a non-minified version of the source).
If you are using layout / mini-code, you can reference the full version of the file so that you can safely delete (or move) the .map file and the code will work again and you will still get the MVC structure.
As a note, I assume that you are not running any jQuery library here, and that you currently do not need access to an invalid version when debugging in the browser. Most often, I am a βconsumerβ of jQuery and, as a rule, do not look in the black box.
For more information, Elijah has excellent information about the point on the source map and how you can use it.
http://www.elijahmanor.com/2013/01/the-magic-of-jquery-source-map.html
Also, if you want to apply a temporary workaround to solve the map minimization problem (may be related), you can check this SO question: jquery 1.9.0 and modernizr cannot be minimized using ASP.NET web optimization
source share